边界扫描和芯片内部全扫描是什么关系？

同问！

是独立的吧，边界扫描是ＰＣＢ的标准。全扫描是芯片内部的ＤＦＴ方法。
对它们之间的接口方式了解不多，搭车盼高人解答！

Boundary scan enables board-level testing by providing direct access to the input and
output pads of the integrated circuits on a printed circuit board. Boundary scan modifies the
I/O circuitry of individual ICs and adds contro l logic so the input and output pads of every
boundary scan IC can be joined to form a board-level serial scan chain.

The boundary-scan technique uses the serial scan chain to access the I/O ports of chips on
a board.

有懂的人讲的明白些吧